In the movie Andromeda Strain, the nurse technician climbs into a backless suit connected to a flexible tube that enables her to function in the clean room. That is how I envision the relationship of the “spirit world” to our “reality world.” Our spirits have simply climbed into our reality suits.
http://www.imdb.com/media/rm956866304/tt0066769
Have you ever rewad the fiftht chapter of Daniel, Old Testament?